Re: [TCML] Secondary and Primary Assistance

["DC Cox" <resonance@xxxxxxxxxxxx>]

With a megger we have found they are not as good insulation as the tube
itself, so I always remove the print prior to sanding and coating with
AC-43.  I have run up to a 16 ft spark out of  20 inch dia. sonotube with no
failures so I don't want to change my receipe.

Dr. Resonance





On 3/20/08, bartb <bartb@xxxxxxxxxxxxxxxx> wrote:
>
> Hi DC,
>
> I have to ask the same as Scott. My 13" sonotube coil retained it's
> print (no problems). And the printing industry is a major part of my
> experience. Inks which are conductive are typically due to the
> technology needed for printing. But these are expensive inks and it
> makes no sense why those inks would be used on sonotube. Conductive inks
> are only needed due to the printing technology. Ink jet or laser
> printing, no. But when "toner" is used such as a Zerox printer, then
> conduction is certain as the toner must be conductive to magnetically
> adhere to the belt or cylinder used for ion deposition technologies (ion
> deposition technology is when conductive inks enter the picture).
>
> It would surprise me if sonotube would use any type of ion deposition
> technology to simply implant logo data. This technology is far more
> expensive and thus it doesn't make sense from a dollar standpoint.
> However, I haven't performed any testing on the sonotube printing (I'm
> simply speculating from my experience in the printing industry).
>
> Take care,
> Bart
>
> huil888 wrote:
> > DC -
> >
> > In a discussion thread about using sonotubes as secondary coil forms,
> > you mentioned that "The print is conductive".
> >
> > Just out of curiosity, is this known to be true (i.e. you've measured
> > the conductivity of the ink printed on the form with a megohmmeter or
> > something similar), or is it an assumption?
> >
> > Regards,
> > Scott Hanson
> >
> >
> > ----- Original Message ----- From: "DC Cox" <resonance@xxxxxxxxxxxx>
> > To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> > Sent: Thursday, March 20, 2008 9:32 AM
> > Subject: Re: [TCML] Secondary and Primary Assistance
> >
> >
> >> This is also removed by peeling or sanding.  The print is conductive.
> >>
> >> Dr. Resonance
> >>
> >>
> >>
> >>
> >> On 1/1/01, Neal Namowicz <neal@xxxxxxxxxxxxxxxx> wrote:
> >>>
> >>>
> >>> Dr. Res,
> >>> I wanted to jump in on this one and ask; do you do anything re: the
> >>> printing
> >>> on the outside of the tube? I've heard people mention sanding off,
> >>> peeling
> >>> off or whatever, the outside layer because of the black ink before
> >>> sealing.
> >>> Have you had any problems with that or do you just coat right over it?
> >>> Thanks!
> >>>
> >>> Neal.
> >>>
> >>>
> >>> ----- Original Message -----
> >>> From: "DC Cox" <resonance@xxxxxxxxxxxx>
> >>> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> >>> Sent: Wednesday, March 19, 2008 5:56 PM
> >>> Subject: Re: [TCML] Secondary and Primary Assistance
> >>>
> >>>
> >>> >A Sonotube (concrete form) works great for small and medium size
> >>> coils.  I
> >>> > have used it for up to 18 inch dia. secondaries.  Inexpensively
> >>> available
> >>> > from large contractor supply firms.
> >>> >
> >>> > You just peel off the upper layer on the inside of the coil which
> >>> contains
> >>> > the slightly conductive release agent.  Then coat with 3 separate
> >>> coats
> >>> of
> >>> > AC-43, both inside and outside.
> >>> >
> >>> > After that insert two acrylic baffles approx 4-6 inches up from each
> >>> end.
> >>> > Prevents any interior flashover.  Affix in place with GE Silicone
> II.
> >>> >
> >>> > Dr. Resonance
> >>> >
> >>>
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